Isabella Phan, MD
NPI 1598977415 · Ophthalmology Physician · San Francisco, CA
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Isabella Phan, MD is a Ophthalmology Physician provider in San Francisco, CA (NPI 1598977415).
Provider details
- NPI number
- 1598977415
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 99033 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 14 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Prednisolone Acetate | 290 | 112 |
| Latanoprost | 151 | 54 |
| Moxifloxacin Hclbrand: Moxifloxacin | 142 | 52 |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 61 | 24 |
| Fluorouracil | 59 | 18 |
| Neomycin/Polymyxin B/Dexamethabrand: Neomycin-Polymyxin-Dexameth | 48 | 29 |
| Brimonidine Tartrate | 39 | 16 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-05-04
- Last updated
- 2022-01-18
Frequently asked questions
- What is Isabella Phan's NPI number?
- Isabella Phan's National Provider Identifier (NPI) is 1598977415, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Isabella Phan's specialty?
- Isabella Phan is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Isabella Phan located?
- Isabella Phan's practice location on file with NPPES is 400 Parnassus Ave, San Francisco, CA 94143-2202.
- What is Isabella Phan's phone number?
- The practice phone number listed in the NPPES registry for Isabella Phan is (415) 353-2608.
- Does Isabella Phan accept Medicare?
- Isabella Phan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Isabella Phan's NPI active?
- Yes — Isabella Phan's NPI (1598977415) is active in the NPPES registry as of the last update on 2022-01-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.